ADF4157

High Resolution 6 GHz Fractional-N Frequency Synthesizer
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Product Details

The ADF4157 is a 6 GHz fractional-N frequency synthesizer with a 25-bit fixed modulus, allowing subhertz frequency resolution at 6 GHz. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. There is a Σ-Δ based fractional interpolator to allow programmable fractional-N division. The INT and FRAC values define an overall N divider, N = INT + (FRAC/225). The ADF4157 features cycle slip reduction circuitry, which leads to faster lock times without the need for modifications to the loop filter.

Control of all on-chip registers is via a simple 3-wire interface. The device operates with a power supply ranging from 2.7 V to 3.3 V and can be powered down when not in use.

Applications

  • Satellite communications terminals, radar equipment
  • Instrumentation equipment
  • Personal mobile radio (PMR)
  • Base stations for mobile radio
  • Wireless handsets

Product Lifecycle

checked Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits

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Product Details

This page contains ordering information for the evaluation board used to evaluate the ADF4157 High Resolution 6 GHz Fractional-N Frequency Synthesizer.


This evaluation board requires an SDP Controller board for connection to the PC. The SDP controller board connects to the PC via USB 2.0. The evaluation board will connect to the SDP controller board. The evaluation board cannot be connected directly to the PC. The evaluation software running on the PC will communicate through the SDP Controller board, to the evaluation board. The SDP Controller board is a separate list item in the ordering guide below (EVAL-SDP-CS1Z). If you have not previously purchased an SDP Controller board, please do so to ensure a full evaluation setup.

Tools & Simulations

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Design Tools

Product Recommendations

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ADF4157 Companion Parts

Recommended Linear Regulators

  • For high accuracy, 5V applications , we recommend the ADP3334 .
  • For a step up, 3V to 5V regulator , we recommend the ADP1613 .
  • For ultalow noise, 3V applications, 200mA output , we recommend the ADP151 .
  • For ultralow noise, 3V applications,150mA output , we recommend the ADP150 .

Recommended Divide-by-4 Prescaler

  • For a low noise, low power, fixed RF block , we recommend the ADF5001 .

Recommended PLL Active Filter

  • For an ultralow noise, rail-to-rail amplifier , we recommend the OP184 .

Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

ADF4157 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

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Reviews

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Overview

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Most Helpful Review

by Anonymous
Like always a very good device from Analog. The very high modulus makes the fractional spurs high close to the carrier in some FRACT settings. Would it be possible to add a low spur mode and a also have a threshold (guessing: related to FRACT value) where this should trigger? Is there a reasonably simple way to predict the spur levels and frequency offset? If possible, it would be great to have low spur mode when spurs are within the PLL bandwidth!

All Reviews

by Anonymous, 7 Jan 13
Excellent component. Very high fractional spurs extremely close to carrier due to high modulus.
Like always a very good device from Analog. The very high modulus makes the fractional spurs high close to the carrier in some FRACT settings. Would it be possible to add a low spur mode and a also have a threshold (guessing: related to FRACT value) where this should trigger? Is there a reasonably simple way to predict the spur levels and frequency offset? If possible, it would be great to have low spur mode when spurs are within the PLL bandwidth!
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.